1.  What is the unit digit in {(6374)^1793*(625)^317*(341)^491}?


zero
2
3
5


Answer

 Option

Unit digit in (6374)^1793 = unit digit in (4)^1793 Unit digit in {(4^2)^896*4} Unit digit in {(6*4) =4. Unit digit in (625)^317 = unit digit in (5)^317 = 5. Unit digit in (341)^491 = unit digit in (1)^491 =1 Required digit = unit digit in (4*5*1) =0.

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2.  The difference between the place value and the face value of 6 in the numeral 856973 is?


973
6973
5994
None of these


Answer

 Option

(Place value of 6) - (Face value of 6) =(6000-6) = 5994.

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3.  (12345679 * 72) = ?


88888888
888888888
898989898
9999999998


Answer

 Option

12345679*72 = 12345679*(70+2) = 12345679 * 70+12345679*2 = 864197530 + 24691358 = 888888888.

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4.  9548 + 7314 = 8362 =?


8230
8410
8500
8600


Answer

 Option

16862 = 8362 + x x = 16862 - 8362 = 8500. 9548+7314 = 16862

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5.  217*217+ 183*183 = ?


79698
80578
80698
81268


Answer

 Option

(217)^ + (183)^2 = (200+17)^2 + (200 - 17)^2 = 2{(200)^2 + (17)^2} = 2{40000 + 289} = (2 * 40289) = 80578.

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